Go to Instagram & type 'cannabis' into the search, that might return some results that you can continue to work off of; if you were to type 'marijuana' into the search you'd be using the unsavory govt term for what we know is actually cannabis.
OK, I went there & typed in 'cannabis' & IG responded with 11,414,576 posts/pics, I picked one pic from the top of the list & found this guy/gal:
World.Weed420 & here's the link to the page & the 347 pics showing: https://www.instagram.com/world.weed420/?hl=en
that's a huge number of pics 11M+, narrow the search by refining it to exactly what you're looking for.......